//const EventEmitter=require('events').EventEmitter;
const {EventEmitter}=require('events');


class Dog extends EventEmitter{
   constructor(name,energy){
    super();
    this.name=name;
    this.energy=energy;
    this.startTime();
  }

  get name(){
    return this.name;
  }

  get energy(){
    return this.energy;
  }
  set energy(e){ 
    this.energy=e;
    this.startTimer();
  }
  startTimer(){
    if(this.timer!==null)return;
    this.timer=setInterval(()=>{
     if(this.energy>0){
       this.energy--;
        this.emit('bark');
      }else{
        clearInterval(this.timer);
        this.timer=null;
      }
    },1000)
  }

  
name='';
  energy=0;
  timer=null;
}
module.exports Dog
